So, with this theory in mind, using the 10-meter Atacama Submillimeter Telescope Experiment (ASTE) in the Atacama Desert, Chile, and the 45-meter Nobeyama Radio Observatory (NRO) in Japan, a research group headed by Keio University's Tomoharu Oka hunted for the emissions from molecular gases associated with supernovae in star clusters.
"Huge star clusters at the center of the Milky Way Galaxy have an important role related to formation and growth of the Milky Way Galaxy's nucleus," said Oka.
Find the Gas; Find the Cluster
One would think that finding giant star clusters is easy, but as we look through the Milky Way's disk toward the galactic center (30,000 light-years away), it is hard to see the star clusters through the gas, dust and stars in front. It's a cosmic equivalent of "you can't see the wood for the trees!" - we can't see the star clusters for the stars (and dust)!.
"The huge amount of gas and dust lying between the solar system and the center of the Milky Way Galaxy prevent not only visible light, but also infrared light, from reaching the Earth," said Oka. "Moreover, innumerable stars in the bulge and disc of the Milky Way Galaxy lie in the line of sight. Therefore, no matter how large the star cluster is, it is very difficult to directly see the star cluster at the center of the Milky Way Galaxy."